Mass killer Anders Behring Breivik has accused the Norwegian state of violating his human rights and trying to kill him by keeping him in isolation, Irish Independent reports.

Breivik, who killed 77 people in 2011, also vowed to fight “to the death” for Nazism as he arrived in a makeshift court Tuesday, March 15 for the first day of hearing over the lawsuit he filed accusing the government of violating his human rights.

He said he had been a follower of Nazism since his youth. “I have fought for national socialism for 25 years, and I will fight for it to the death,” he said of the Nazi party’s political doctrine.

"The worst is isolation ... I am locked up 23 hours a day," Breivik said, answering questions from his lawyer, Oeystein Storrvik.

Breivik claimed he suffered degrading conditions in prison, including microwaved meals that were "worse than waterboarding" and that he found regular strip searches "bothersome and offensive."

On 22 July 2011, the Norwegian national killed eight people by detonating a van bomb amid the government quarter Regjeringskvartalet in Oslo, then murdered 69 participants of a Workers' Youth League (AUF) summer camp on the island of Utøya. In August 2012, he was convicted of mass murder, causing a fatal explosion, and terrorism.